All concepts combined
Primary 3 Area and Perimeter study guide: the whole chapter, step by step
About this subtopic
This mixed practice stop brings together 6 topics from Primary 3 Area and Perimeter: Count square units, Follow the boundary, Rectangle and square area, Find a missing side, Joined rectangles, Identical pieces. Nothing on the question says which topic it comes from, so choosing the method is part of the skill.
Practice questions with worked solutions
Question 1 is free to try. The other 11 open in the free trial, each with its solution film.
Question 1 of 12 · Basic · free to tryEach small square in the grid has an area of 1 cm². Find the area of the…Each small square in the grid…
Each small square in the grid has an area of 1 cm². Find the area of the shaded figure.
Show the working and the answer
Working
- Whole squares = 4 + 3 + 5 = 12
- Area = 12 × 1 = 12 cm²
- The area of the shaded figure is 12 cm².
Answer: 12 cm²
For parents
How do you tackle P3 area and perimeter mixed practice questions?
This page mixes every Primary 3 area and perimeter subtopic so your child has to decide, from the question alone, whether to count squares, go round the edge, multiply, work backwards or use units.
What your child learns here
This page mixes every Primary 3 area and perimeter subtopic so your child has to decide, from the question alone, whether to count squares, go round the edge, multiply, work backwards or use units. Choosing the method is the skill being practised, so nothing on a question names its subtopic.
- Telling area from perimeter by what the question asks: surface covered, or distance round.
- Counting square units on a grid, including half squares.
- Finding the perimeter of a rectilinear figure, rectangle or square.
- Using length × breadth for the area of a rectangle or square, and running it backwards for a missing side.
- Applying these ideas to figures built from rectangles, including identical ones.
Does the answer make sense?
Before checking any number, match the unit to the question's word. An area, or how much greater one area is, ends in cm² or m²; a perimeter, a length or a breadth ends in plain cm or m. A mismatch shows your child has measured the other thing.
How to practise these questions
This set mixes the chapter's question types: counting squares, perimeter, area of rectangles, missing sides, joined figures and identical pieces. The Basic questions keep each skill to one step, and the Intermediate questions add a second one. The Challenge questions require your child to decide whether area or perimeter is wanted and which lengths to find first. When an area or perimeter question in this set stalls, view its solution film and try again later from Revision.
Questions parents ask
What does the P3 area and perimeter chapter cover? The Primary 3 syllabus lists the concepts of area and perimeter, measuring area in square units, cm² and m², the perimeter of rectilinear figures, rectangles and squares, and the area of a rectangle or square. The pages in this chapter also apply those rules to missing sides and to shapes built from rectangles.
Why does my child do well on each topic but not on mixed questions? On a topic page every question uses the same method, so the choice is made for them. In mixed questions the first step is deciding what to do, which takes practice of its own. Asking area or perimeter before any working builds that habit.
How many mixed questions should my child do at a time? A few done carefully are worth more than many done fast. Five or six, each checked with its unit and against the picture, is plenty for one sitting at this age.